NO_HW devices

[Prashant Zanwar_4]

I have got many of NO_HW devices in rp8420, these are around 2500..All disk devices...and are EMC one...
I wanna remove all of these, so as to make ioscan o/p look better...
How do I plan...

insf -e
and rmsf -a

would this be correct to do..suggestions..?
Thanks and regards
Prashant

[A. Clay Stephenson]

I would write a script that captures your current ioscan output and for each of those that indicate NO_HW issue a rmsh -H hw-path.

[Bill Hassell · Accepted solution]

I would not use insf -e first. Cleanup to old devices and their mapping with rmsf -aH 12/34.5.6.7 (whatever the hardware path is). Make sure that the -H hardware path refers to the H/W Type = DEVICE. You may need to parse ioscan's output into a file and create all the rmsf -aH commands there. Then run ioscan without the -k option to update the lernel's view of the current hardware, followed by insf -e to create any missing device files.

[Steven E. Protter]

If you have done a lot of changes/removals and such on this server, you may need to run rmsf on them individually.

I've run into situations that actually forced me to renumber my instance numbers, which clears the numbers and device files and lets me start over.

HP has some very appropriate warnings concerning backups and this procedure. Proceed with caution IF you need to use it.

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&admit=-1335382922+1098717421883+28353475&docId=200000067424466

Usually a script that reads the ioscan output for NO_HW and issues rmsf commands will do the trick.

SEP

[Jeff Schussele]

Hi Prashant,

Usually these are created by moving FC HBAs, switch ports or array FAs around.
Generally that means the controller # is all that's changing so you might be able to just issue
rmsf /dev/dsk/cX* /dev/rdsk/cX
(where X=appropriate controller number)
commands and remove bunches at a time.
Although I would agree that a script is better suited to this task.

Rgds,
Jeff

[Prashant Zanwar_4]

I believe if I grep for tgt devices, after which follow the mapped devices to those paths, I can do those rmsf -ah on tgt paths which have NO_HW status...is that good enough, your thought?
CLASS = tgt and HW_TYPE=NO_HW... removing these shall take care of stuff I want to..

Thanks and regards
Prashant

[Geoff Wild]

Just removing the files will not clean up the NO_HW - you must also do one of the following:

reboot or ioscan -fnC disk

as the running kernel still will think that it used to have a disk at that path...

Rgds...Geoff

[Marvin Strong]

I have ran the following many times on my systems to cleanup the NO_HW. Occassionally there is one device that will not go away until reboot.


ioscan -fnkC disk | awk '/NO_HW/{print $3}' | xargs -i rmsf -H {}

[Florian Heigl (new acc)]

Just out of couriosity why doesn't anyone of You go the easy way?

for devn in `ls /dev/*dsk/*`; do if `lssf $devn | grep "at address ??" 2>/dev/null 1>/dev
/null`; then rmsf $devn ; fi done

lssf asks the kernel without rescanning, so unless some of Your devices suddenly returned, this will be faster.

[Prashant Zanwar_4]

Is it safe to run ioscan -fnC disk after this, can it cause any problem?
I am just referring to last response...I have that step...Kernel didnt flush the list yet..

Thanks and regards
Prashant